Steam locomotive



J. G, BLUNT STEAM LocoMoTIvE Filed Oct. 20, 1938 2 Sheets-Sheet 1 INVENTOR n Eines (iB/unf BY 1 /3 l J/f 2 V ATT EY.

Aug. 29, 1939.

J. G. BLUNT Aug. 29, 1939.

STEAM LOCOMOTIVE 2 sheets-sheet 2 Filed Oct. 20, 1958 INVENTOR Jim/1 es G B laf/1f Patented Aug. 29, 1939 UNITED STATES PATENT OFFICE STEAM LOCOMOTIVE Application October 20, 1938, Serial No. 235,941

7 Claims.

This invention relates to steam locomotives, and more particularly to cabs therefor.

The principal object of the invention is to devise a cab entirely supported from the boiler of the locomotive by lower supporting means and upper supporting means.

Referring to the drawings, Figure 1 is a side elevation, partly in dot and dash lines, of the rear portion of the locomotive involving the present invention, a portion being broken away to show interior partsin full; Fig. 2, at the right, is a section on the line II-II of` Fig. 1, and at the left a rear view of the locomotive of Fig. 1; Fig. 3 is a plan View of half the cab lower supporting means and cab deck, and a portion of the rear walls of the boiler, shown in section, to which the lower supporting means is secured; Fig. 4 is an enlarged plan view of half of a casting forming the bracket of the lower supporting means; Fig. 5 is an end view of the bracket shown in Fig. 4; and Fig. 6 is a fragmental plan View of the upper cab supporting means, somewhat foreshortened, and a portion of the rear wall of the cab shown in section.

'I'he locomotive, generally speaking, is of a conventional type, and is indicated generally by the reference numeral I. It comprises a boiler 2 (the rear portion only being indicated, this being the rebox of the boiler), a cab 3,

and a runningV gear 4 including a. main frame 5, these parts being of a conventional type.

It will be understood that the boiler is mounted upon the main frame in the usual manner to provide for longitudinal movement relative to the main frame during expansion and contraction of the boiler, and to this end the rear portion of the boiler is mounted upon the rear portion of the main frame by the usual sliding connection 6.

The cab lower supporting means comprises a structure 1. The structure comprises two side brackets 8, an intermediate bracket 9, and other parts later to be described. 'Ihe side brackets 8 each comprise a bar I0 secured at its forward end by bolts to a lug I I depending from a side of the mud ring (not sho-wn, but of usual construction). The bar I0 extends rearwardly, is bent outwardly from the boiler side, then upwardly to a point near the rear wall of the cab,

and then horizontally for a short'distance to the rear wall of the cab.

A bracket I 2 is studded to the sides of the rebox above the lug II and is provided with a horizontal sleeve I3. The bracket 8 further comprises a vertical plate I4 pointing rearwardly (Cl. 10S- 456) with its upper edge horizontal and a lower edge inclined upwardly in a rearward direction. The plate is bolted to the outer face of the bar Ill. Upon the outer face of this plate, adjacent its upper edge, is bolted the depending leg of an 5 angle iron I 5, the rear bolts .also bolting the angle iron I5 to the bar I0. The horizontal leg of thel angle iron is directed inwardly above the plate I4 upon which leg the cab deck plate I 5 rests and is bolted, or otherwise secured, the bolts 10 not being shown but the bolt holes being indicated at I 1.

The angle iron extends forwardly, and to the depending leg of the forward end is bolted a rod I8 flattened at its rear end to provide for the 15 bolt fastenings. Between the `ilattened end and the angle ironl is a ller strip I9. The forward end of the rod I8 is threaded and passed through the sleeve I3, a nut 20 being screwed on the rod at each side of the sleeve. 20

A transverse angle iron 2| extends between the rear ends of the side brackets 8 and is secured to these ends by bolted knee brackets 22. 'Ihe angle iron 2I has a depending vertical leg and an inwardly directed horizontal leg. The 25 cab deck plate rests upon and is bolted to this horizontal leg by bolts, the bolts not being shown but the bolt holes being indicated at 23.

The before-mentioned intermediate bracket 9 is formed preferably as an integral casting. This 30` intermediate bracket 9, in addition to aiiording support for the deck plate, can be adapted to a multiplicity of purposes, such as forming a support for the stoker, the brake valve, and the fulcrums for the grate shaker levers. 35.y

' The intermediatel bracket casting is of web construction to aiord additional strength, and to lighten it, it is provided with openings, and the cab deck plate is cut away at the front central portion of the casting which, for conven- 40- ience of illustration, is not shown as it forms no part of the present invention; also as these features of the casting thus described form no part of the present invention, no detailed de scription is deemed necessary. 45

The front wall of the casting comprises two separate parts inclined upwardly and forwardly, one at each side of the central portion of the casting, providing pads 24 and another separate portion disposed at the bottom of the cen- 50 tral portion providing a pad 25. These pads are for securing the casting to the boiler. The pads 24 are studded to the back wall of the boiler, and the pad 25 is bolted to a lug 26 depending from the rear portion of the mud ring. The 55 casting is provided beyond the pads 24 with what may conveniently be termed wings 2l and at each side of the central portion of the casting is a rearwardly extending lug 28.

It will be understood that while Figs 3 and 4 show but half the construction, the other half is similar and that, as to the features of the'lower supporting means now to be described, a description of but one side will suiiice, namely the side shown in Figs. 3, 4 and 5.

The rear wall of the wing 2l provides a vertical face against which a vertical plate 29 engaged. The plate is turned rearwardly at its outer vertical edge, forming a flange 3E! which is bolted to ther adjacent side bracket 8. The plate is turned rearwardly at a portion of its upper edge, forming a flange 3l which is bolted to the cab deck, the bolt holes 32 only being shown. The plate is secured to the rear Wall of the wing by bolts, indicated at 33.

A bar 34, substantially Z-shape in cross section, extends longitudinally from the plate 29 rearwardly. It has an upper horizontal leg 35 bolted to the cab deck plate, the boltholes 35 only being shown. This bar is secured at its forward end to the plate 29 and wing 2l by knee brackets 31, the knee brackets being secured to the plate and wing by bolts, indicated at 38, which provide further means of securing the plate to the wing. The knee brackets are secured to the intermediate web of the Z bar by bolts indicated at 39. The Z bar extends rearwardly to the vertical leg of the angle iron`2l (the leg 35 being foreshortened to permit this) and is secured thereto by knee brackets MJ, the brackets being bolted in a manner similar to those of the brackets at the forward end.

A vertical plate 4| extends between the intermediate bracket 9 and the angle iron 2i. It has a horizontal upper edge and a lower edge inclined upwardly in a rearward direction. Its forward end is secured to the lug.28 by means of bolts, indicated at 42. Its rear edge is bent outwardly and secured to the vertical leg of angle iron 2| by bolts, indicated. at 43. Theplate 4l extends from the lug 28 rearwardly in an outward direction. The plate at its upper margin is secured to the vertical depending leg of an angle iron 44 by bolts (not shown), the horizontal leg being bolted to thecab deck plate, the bolt holes 45 only being shown.

The cab deck plate at its forward edge adjacent the boiler is spaced from the rearand side walls of the boiler, Vthe space being indicated by the reference numeral 46. The cab deck is further secured to the boiler by a curved angle iron lll, the horizontal leg of which is secured to the cab deck plate by bolts Y118, and the vertical leg of which is secured to the` boiler by studs 49, the space 46 being filled by collars 5G mounted on the studs.

The cab 3 is supported upon the deck plate and secured thereto by angle irons v5| having vertical legs bolted to the walls of the'cab and horizontal legs bolted to the cab deck plate in the ordinary manner. Y

A finishing strip 52 extends along Vthe side, a portion ofthe front, and a portion of the rear edges of the deck plate. The strip is of T-shape in cross section, the stem of the T beingV secured to the margins of the deck plate in any desired manner as by rivets (not shown).

The nuts 20 at the forward side ofthe sleeves I3 are for the purpose of providing tension in the rod I8A and the angle iron l5, and when these nuts are sufficiently tightened to draw the rods and angle irons to the proper tension, the nuts 20 at the rear of the sleeves are tightened to maintain this tension, the deck plate being thus brought to and maintained in a level position.

It will be noted that the cab is entirely supported from the boiler, having no connection Whatever with the locomotive frame. Furthermore, the cab is rigidly connected to the lower supporting means. In usual practice the cab, at its rear portion, is supported upon a vertical plate. The plate is made flexible so that it will flex to compensate for any longitudinal movement or Vibration of the cab. Such connection, however, is objectionable as there is danger of fracture and loosening of the parts when subjected to constant flexing. Such a plate is entirely eliminated in the present instance and the cabis rigidly supported and secured to a rigid lower supporting means, which is constructed for adequate strength and rigidity.

The upper cab supporting means comprises a structure 53. The structure comprises a bracket 5 secured to the upper portion of the rear wall of the boiler at the longitudinal center line thereof by studs 55. The bracket is forked, providing the branches 55. A bolt 5l is mounted in orices formed in the branches 5t.

The upper supporting means further comprises two rods 5S mounted at their forward ends upon the bolt 5l between the branches 55, the rods being orifced to permit this. This provides a pivotal connection for the rods at the bolt 5l. Ihe rods extend rearwardly Vthrough the cab and are bent near their forward ends so that l they diverge from each other in a transverse direction whereby at their rear endsthey pass through the upper portion of the rear wall E@ of the cab at widely separated points equi-distant from the longitudinal center line of the boiler. The wall 59 at these points is orii'lced, and a sleeve 6U extends through each of the orices and is welded to the wall 59. The rods 53 pass through these sleeves. Each rod 58 is threaded at its rear end portion and a nut Si is screwed on each rod at each side of the sleeves.

The upper supporting means further comprises tworods 52, having their inner ends mounted upon the bolt 5l, these inner ends being oriced to permit this. The rods 52 are mounted on the bolt 5T at the outside of the branches 55. They are bent at their inner end portions at substantially a right angle and extend from the bolt 5l outwardly in a direction transversely of the boiler, through the upper portion of the cab. rIhe rods 62 at their outer ends are secured to the top Wall 33 of the cab. This is accomplished in the present instance as follows: A bracket or plate 64 is provided for each rod 62. It is secured to one of the usual cab rafters 65 in any desired manner, as by welding (not shown). rThe outer end of each Vrod 62 is forked, providing branches ES. The adjacent bracket 661 fits between these branches and is connected thereto by a bolt 6l, the bracket and branches being oriced to vpermit this. Each rod 62 thus has pivotal connection at the bolt 61. The rods 52 provide lateral supports for the upper portion of the cab holding the cab true in this direction, and help to rigidify the cab. The nuts 5| at the rear of the sleeves 50, that is to say at the rear of the rear wall 59 of the cab are for the purpose of providing tension in the rod 53, and when these nuts are sufficiently tightened to draw the rods tothe proper tension, the nuts 6| at the front of the sleeves are tightened. By this means the upper rear portion of the cab is drawn up to the required extent to true up and help rigidify the cab. It will be noted that the adjustment of these nuts 6| does not effect the rods 62 nor their functioning as lateral supports for the upper portion of the cab. By means of the rods 58 and 62 the upper portion of the cab is supported from the boiler and the cab thereby is held true both in longitudinal and transverse direction.

The front wall 68 of the cab is provided with an opening within the defining edge 69 to permit the rear end portion of the boiler to extend into the cabin the usual manner as shown in Fig. 1. In usual locomotive p-ractice the upper portion of the front wall of the cabis secured to the upper portion of the boiler adjacent the edge 69. This provides an undesirable Way of connecting the cab with the boiler. The connection is more or less rigid and is sometimes fractured or causes injury to the cabor boiler'during working or racking of the parts when the locomotive is in service. With the present invention such connection is not essential nor desirable. The rods 58 and 62 give good support to the upper portion of the cab and support it from the most advantageous points, supporting it both longitudinally and transversely. 'Ihe rods 58, due to their degree of divergence, provide a support for the rear upper portion of the cab, affording some support in a transverse direction as well as in a longitudinal direction. The lower supporting means in com.- bina'tion with the upper supporting means provide an adequate complete support for the cab from the boiler. The cab is entirely free from the main frame of the locomotive and freely moves as a unit with the boiler in a longitudinal direction as the boiler expands and contracts. This expansion and contraction therefore places no strain upon the cab.

While there has been hereinbefore described an app-roved embodiment of this invention, it will be understood that many and various changes and modifications in form, arrangement of parts and details of construction thereof may be made without departing from the spirit of the invention and that all such changes and modifications as fall within the scope of the appended claims are contemplated as a part of this invention.

The invention claimed as new and desired to be secured by Letters Patent is:

1. In a locomotive, the combination of a boiler; a structure secured to and extending rearwardly from the rear end portion of said boiler comprising substantially vertical side portions extending in a direction longitudinally of said boiler and an intervening portion tying said side portions together forming a rigid support for a cab; and a cab carried by said support, said structure further comp-rising an upper and a lower rod-like member extending forwardly from each side portion in vertically spaced relation to each other, each upper member being secured to and extending forwardly from the upper part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, and each lower member being secured to and extending forwardly from the lower part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, said members cooperating, the upper members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cab upon said structure.

2. In a locomotive, the combination of a boiler; a structure extending rearwardly from the rear end portion of said boiler; means securing said structure, at the central portion of its forward end, to the rear end of said boiler, said structure comprising substantially vertical side portions extending in a direction longitudinally of said boiler and an intervening portion tying said side portions together forming a rigid support for a cab; and a cab carried by said suport, said structure further comprising an upper and a lower rod-like member extending forwardly from each side portion in vertically spaced relation to each other, each upper member being secured to and extending forwardly from the upper part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, and each lower member being secured to and extending forwardly from the lower part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, said members cooperating, the upper members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cab upon said structure.

3. In a locomotive, the combination of a boiler; a structure projecting rearwardly from the rear end portion of said boiler, free from support except by said boiler; means securing said structure, at the central portion of its forward end, to the rear end of said boiler, said structure comprising substantially vertical side portions extending in a direction longitudinally of said boiler and an intervening portion tying said side portions together forming a rigid support for a cab; and a cab carried by said support, said struc-- ture further comprising an upper and a lower rod-like member extending forwardly from each side portion in vertically spaced relation to each other, each upper member being secured to and extending forwardly from the upper part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, and each lower member being secured to and extending forwardly from the lower part of its respective side portion, and secured at its forward-end to said boiler at the side thereof adjacent thereto, said members cooperating, the upper members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cab upon said structure.

4. In a locomotive, the combination of a boiler; a structure secured to and extending rearwardly from the rear end portion of said boiler comprising substantially vertical side portions extending in a direction longitudinally of said boiler and an intervening portion tying said side portions together forming a rigid support for a cab; and a cab carried by said support, said structure further comprising an upper and a lower rod-like member extending forwardly from, each side portion in vertically spaced relation toeach other, each lower member being secured to and extending forwardly from the lower part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, and each upper member being secured to and extending forwardly from the upper part of its respective side portion; means supported by and secured to said boiler at each side thereof; and adjustable means at each side of said boiler,

each connected to the forward end of the upper member adjacent thereto and to the adjacent boiler supported means, adjustable for controlling the tension of its said adjacent upper member, said members cooperating, the upper members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cab upon said structure.

5. In a locomotive, the combination of a boiler; a structure extending rearwardly from the rear end portion of said boiler; means securing said structure, at the central portion of its forward end, to the rear end of said boiler, said structure comprising substantially vertical side plates extending in a direction longitudinally of said boiler and an intervening composite portion tying said side plates together forming a rigid support for a cab; and a cab carried by said support, said structure further comprising an upper and a lower rod-like member extending forwardly from each side plate in vertically spaced relation to each other, each upper member being secured to and extending forwardly from the upper part of its respective side plate, and secured at its forward end to said boiler at the side thereof adjacent thereto, and each lower member being secured to and extending forwardly from the lower part of its respective side plate, and secured at its forward end to said boiler at the side thereof adjacent thereto, said members cooperating, the up-per members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cab upon said structure.

6. 1n a locomotive, the combination of a boiler; a structure extending rearwardly from the rear end portion of said boiler comprising a casting secured to the rear end of Vsaid boiler, substantially vertical side plates extending in a direction longitudinally of said boiler and an intervening portion secured to and extending rearwardly from said casting and tying said side plates together forming a rigid support for a cab; and a cab carried by said support, said structure further comprising an upper and a lower rod-like member extending forwardly from each side plate in Vertically spaced relation to each other, each upper member extending forwardly from the rear upper part of its respective side plate along the upper margin thereof, secured at a plurality of points thereto, and secured at its forward end to said boiler at the side thereof adjacent thereto, and

each lower member extending forwardly from the rear upper part to the forward lower part of its respective side plate, secured at a plurality of points thereto, and secured at its forward end to said boiler at the side thereof adjacent thereto, said members cooperating, the upper members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cam upon said structure.

7. In a locomotive, the combination of a main underframe; a boiler adapted, during expansion and contraction, for longitudinal movement at its rear end portion relative to said underframe; a structure secured to and extending rearwardly from the rear end portion of said boiler for longitudinal movement with said boiler comprising substantially vertical side portions extending in a direction longitudinally of said boiler and an intervening portion tying said side portions together forming a rigid support for a cab; a. cab carried by said support, said structure further comprising an upper and a lower rod-like member extending forwardly from each side portion in vertically spaced relation to each other, each upper member being secured to and extending forwardly from the upper part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, and each lower member being secured to and extending forwardly from the lower part of its respective side portion, and secured at its forward end to said boiler at the side thereof adjacent thereto, said members cooperating, the upper members to serve as tension members and the lower members to serve as compression members to resist weight imposed by said cab upon said structure; and tie rods connecting upper parts of said cab to said boiler including two rods connected at their rear ends to the upper rear portion of said cab and at their forward ends to the upper rear portion of said boiler, and two other rods connected respectively at their outer ends to opposite sides of said cab at upper front portions thereof and at their inner ends to the upper rear portion of said boiler, whereby the top part of said cab is held against movement away from said boiler rearwardly in a longitudinal direction, and said cab at its front top part is held against lateral movement in either direction relative to said boiler.

JAMES Gr. BLUNT. 

